Thank you for taking time to review this adhesive. Let’s take a look at the product usage and performance values to see what can cause a slowing of the cure process. Temperature or humidity increases or decreases can affect the performance of the installation. High temperature and low humidity will cause the adhesive to cure faster. The cure of the 6700 could be taking a bit longer when used over non porous substrate (aluminum or resin coated fiberglas. Continue to allow the installation to cure before exposure to excess moisture conditions to help ensure performance and installation success.